Punching-machine.



' P. S. SHAVER.

PUNCHING MACHINE. APPLICATION FILED JAN. 17. 19:0.

Patented Apr. 29, 1919.

4 SHEETS-SHEET I.

P. S. GRAVER. PUNCHING MACHINE APPLICATION FILED JANLW. 191s.

Patented Apr. 29,1919.

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P. S. GRAVER.

PUNCHING MACHINE.

APPLICATION FILED IAN. I7. 1916. 1,301,931 0 Patented Apr. 29,1919.

4 SHEETSSHEET 3.

P. S. GRAVER.

PUNCHING MACHINE.

APPLICATION FILED 1AN.'1 7. IBIS.

Patented Apr. 29, 1919.

4 SHEETS-SHEET 4.

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. PHILIP s. (maven, or cHIcAeo, ILLINOIS.

PUNGHING-MAGHINE.

To all whom it may concern:

Be it known that LYPHILIP S. GRAVER, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Punching-Machines, of which the following is a full, clear, conoise, and exact description, reference. being had to the accompanying drawings, forming a part of this specification.

My invention relates to punching mech-. anism and work holding means for adj ustably positioning work withreference to the punch structure. The machine of my inven tion is of particular utility in punching rivet holes in peripheral portions of plates that are to constitute the ends of tanks, etc, my improved machine being-of service in operating upon such plates that are'of widely dlfi'erent diameters. In the machine of my invention there is desirably included a set or gang of punches and corresponding dies that are upon the) arc of a circle having a diameter which is intermediate the diameters of plates of larger and smaller diameters, my machine enabling the use of the same punching mechanism upon plates of approximate sizes without substitution of new punching mechanism.

I will explain my invention more fully by reference to the accompanying drawings showing the preferred embodiment thereof and in which Figure 1 is alongitudi-nal sectional view of the mechanism of my invention; Fig. 1 is a view on line 1 1 of Fig. 1;

- Fig. 2 is a plan view. on line 2 2 of Fig. 1;

Fig. 3 is an end elevation of the structure; Fig. 4: is a sectional view on line 1 4: of Fig. 1; Fig. 5 is a plan view of a part of the structure; and Fig. 6 is another plan view showing parts in different relation.

Like parts are indicated by similar characters of reference throughout the different figures.

The mechanism includes a punch press 1, of any suitable construction, the punch press illustrated including a normally stationary die member 2 supported within the throat of the punch press and a separable punch carrying member 3 driven by the power device 4: whose association with the member 3 is governed by any suitable clutch mechanism (generally indicated at 5) that may be controlled by a. treadle 6. As the invention is preferably practised the punch carrier 3 carries a plurality or gang of punches 7, the

plate 19.

Specification of Letters Patent. Patented App; 29 19319, 1 Application filed January 17, 1916. Serial No. 72,451.

die member 2 having as many punch receivmg openings 8 as there are punches. The punches 7 and the receiving openings 8 are desirably arranged upon an arc of a circle which is of mean diameter respecting circular plates of somewhat smaller and larger diameters, a die and punch structure of other curvature being substituted when the circulariplates to be operated upon thereby are of much smaller or larger diameters.

Referring more particularly to Fig. 1, the circular plate or other work 9 to be operated upon is mounted upon a spider 10 and is secured .in relation thereto by any suitable means such as the bolts 11. This spider is anchored to a table 12 by means of bolts 13, the legs of the spider having their outer ends on a higher horizontal level than the portions thereof which are anchored to the table whereby the fastening bolts 13 may be accommodated While at the same time the work 9 may be positioned to lay snugly upon the top of the die member 2. The table is secured, by means of bolts ll, to the flange 15 at the upper end of a bearing sleeve 16. This bearing sleeve may be turned about the normally stationary vertical shaft 17, (constituting an element that defines the axis of rotation of the turn table 12), the bearing sleeve being prevented from rising by means of the enlargement 18 at the upper end of the vertical shaft and from being lowered by resting upon a stationary bearing The vertical shaft 17 projects downwardly below the bearing plate 19, this lower portion of the shaft being penetrated by a horizontal shaft 20 that is in threaded engagement with the shaft 17. The outer end of the shaft 20 has applied thereto a hand wheel or lever 21 by which the shaft 20 may be turned. The ends of the shaft 20 are journaled in bearings 22, 23 which are normally stationary, being carried by the transverse members 24:, 25 of a framework that includes the longitudinal members 26, 27. This framework is carried upon pedestals 28. By turning the shaft 20 with the aid of the hand wheel 21 the vertical shaft 17 may be moved bodily to and from the punch press to adjust the work with reference to said press and in order that the shaft 20 may be relieved of the weight of the shaft 17 the sleeve 16 is caused to bear the weight of the shaft 17 by the shaft head 18 fixed upon the upper end of the shaft 17; while the weight of the sleeve 16 is borne by the bearing plate 19 that rests upon the longitudinal frame I which the bearing plate 19 may s'lide when the shaft 17 is being shifted to adjust Work of new size to the punch press.

When the Work operated upon by the ma chine is in the form of a disk or circular plate that is to have perforations punched therethrough adjacent itsperiphery the table 12 should be in the form of a turn table, on which account the table supporting'sleeve' 16 is journaled to rotate about the vertical shaft 17. In order thatthe Workhol'ding table may; When turned, be accuratelypositioned and held accurately in position; I def sirably provide a ratchet and holding'd'og structure which may includea circular rack 29 which. is concentric with the shaft 17 ahd is secured tothe periphery of the supporting plate 19. The table would then carry a trailing holding dog 30. pivotally mounted upon the underside of the table andhaving its holding end trailing over the teeth of the ratchet. The table may readily be turned in one direction only until the work has been sufficiently turned to adjust it With reference to the punch mechanism, the table having turning effort exerted thereupon in a reverse direction. after the adjustment has been secured to hold the dog in tight engagement with a ratchet tooth adjacent the same, the accuracy of the position of the work with reference to the punch mechanism thereby being assured. In Fig. 6 the Work 9 is shown in the form of a 'se'micir cular plate While in Fig. 5 the work is in the members 26, 27 and. on

the precise details of construction shown 1. The combination of a frame, a beans- 'plate'slidablymounted on the frame, a vertical shaft extending through the bearing plate, abearing sleeve rotatable on the "shaft with its lower end in engagement with the bearing" plate and having iiitereii 'a aieaa/- i vith'tlie shaft, a turntable supported bytlie bearing sleeve a wprksuppert an the turntable, and means chanting with said shaft to slide thebearing' plate relatively to the frame. A 7

=2. The combination of frame; a bear ing plate slidably mounted mi the frame; a vertical shaft extendingthrough-the bearing plate; a bearing sleeve rotatable on the shaft with its lower end in engagement with the bearing plate' andzliai ing' interim-gage; ment With the shaft, a turn table su ported by the bearing sleeve 4, 'wor'k support mounted on the turn' taiil'e'; a Vertically ex tended tubular member secured to the hearing' p'late concentric with the shaft, teeth on the upper edge of said "aflcaila member; pawls mounted on'the underside of the turntable and cooperating with said teeth; and means coacting with said shaft to slide the bearing platerel'atively to the frame;

In witness whereof; I hereunto subscribe my name this third dayof December; A. D.

a V PHILIP SJGRAVER. Witnesses:

Gr; I2; Cease; ETTA D; WHITE:

Copies of this patent may be obtained foifire cents each; By a'diirifling the ommissiiiiiei' bf i atnts, Washington, D. G." 

